Update puma (CVE-2019-16770)

Author: Vidas P

Gemfile

@@ -137,7 +137,7 @@ group :development do
   end
 end
 
-gem 'puma', '~> 4.3.0'
+gem 'puma', '~> 4.3.1'
 
 ENV['DATABASE_ADAPTER'] ||=
   if ENV['RAILS_ENV'] == 'production'

Gemfile.lock

@@ -312,7 +312,7 @@ GEM
     nenv (0.3.0)
     net-ftp-list (3.2.8)
     netrc (0.11.0)
-    nio4r (2.3.1)
+    nio4r (2.5.2)
     nokogiri (1.10.5)
       mini_portile2 (~> 2.4.0)
     notiffany (0.1.3)
@@ -367,7 +367,7 @@ GEM
       pry (>= 0.10.4)
     psych (3.1.0)
     public_suffix (4.0.1)
-    puma (4.3.0)
+    puma (4.3.1)
       nio4r (~> 2.0)
     rack (2.0.8)
     rack-accept (0.4.5)
@@ -641,7 +641,7 @@ DEPENDENCIES
   pg (~> 1.1.4)
   pry-byebug (~> 3.7.0)
   pry-rails (~> 0.3.9)
-  puma (~> 4.3.0)
+  puma (~> 4.3.1)
   rack-livereload (~> 0.3.17)
   rack-timeout (~> 0.5.1)
   rails (~> 5.2.3)